Allergens are a cross-industry regulatory challenge that affects every company formulating products applied to skin, inhaled as fragrance, or consumed as food. The regulatory frameworks differ — EU Cosmetics Regulation 1223/2009 governs cosmetics, the International Fragrance Association (IFRA) sets standards for fragrance ingredients, and the EU Food Information Regulation (EU FIR) mandates allergen declaration for food — but the underlying problem is the same: identifying, tracking, and declaring allergenic substances accurately across complex formulations. For companies operating across more than one of these industries, or for platforms that serve all three, a unified approach to allergen management is not a convenience but a necessity.
Allergens in Cosmetics: EU Regulation 1223/2009
The European Union Cosmetics Regulation 1223/2009 established a list of fragrance allergens that must be individually declared on cosmetic product labelling when present above specified concentration thresholds. The original list identified 26 fragrance allergens — substances such as linalool, limonene, citronellol, geraniol, and hexyl cinnamal — that must appear in the INCI (International Nomenclature of Cosmetic Ingredients) list when their concentration exceeds 0.001% in leave-on products or 0.01% in rinse-off products.
In 2023, the European Commission updated and expanded this list significantly, adding new substances and reclassifying others based on updated scientific evidence from the Scientific Committee on Consumer Safety (SCCS). This expansion means that cosmetics formulators must now track a larger set of allergenic substances, recalculate concentrations across their entire product portfolios, and update labelling accordingly. For companies with hundreds or thousands of active formulas, this regulatory change generates a substantial compliance workload.
The Concentration Threshold Challenge
What makes cosmetic allergen management particularly demanding is the concentration-dependent nature of the declaration requirement. An allergen present at 0.0008% in a leave-on product does not require declaration; at 0.0012%, it does. When a fragrance compound or botanical extract is reformulated by its supplier — even slightly — the downstream cosmetic product may cross a threshold without the formulator realising it, unless their software recalculates allergen concentrations automatically from the updated raw material composition data.
Allergens in Fragrance: IFRA Standards and Labelling
The fragrance industry operates under the standards set by the International Fragrance Association (IFRA), which publishes regularly updated amendments restricting or banning specific fragrance ingredients based on safety assessments conducted by the Research Institute for Fragrance Materials (RIFM). IFRA standards do not replace local regulations — they complement them, and in many cases set stricter limits than national laws.
For perfumers and fragrance houses, allergen management involves two parallel tracks. First, compliance with IFRA standards: ensuring that restricted ingredients are used within permitted limits for the specific product category (fine fragrance, body lotion, lip product, household cleaner — each with different limits). Second, compliance with labelling regulations in the target market — which, in the EU, means declaring the same 26+ fragrance allergens required under Regulation 1223/2009, since most fragrances are ultimately incorporated into cosmetic or personal care products.
The complexity multiplies when a single fragrance compound is sold to multiple clients for use in different product categories. The same accord may be compliant for use in a fine fragrance (where higher allergen thresholds apply) but non-compliant for use in a baby lotion (where thresholds are stricter). Tracking these category-specific limits across a portfolio of hundreds of fragrance compounds requires structured data and automated checking — not spreadsheets.
Allergens in Food: EU Food Information Regulation
The EU Food Information Regulation (EU FIR, Regulation 1169/2011) requires that food businesses identify and declare the presence of 14 major food allergens: cereals containing gluten, crustaceans, eggs, fish, peanuts, soybeans, milk (including lactose), tree nuts (almonds, hazelnuts, walnuts, cashews, pecans, Brazil nuts, pistachios, macadamia nuts), celery, mustard, sesame seeds, sulphur dioxide and sulphites (at concentrations above 10 mg/kg), lupin, and molluscs.
Unlike cosmetic allergen declaration, which is concentration-dependent, food allergen declaration under EU FIR is binary: if any of the 14 allergens is present — as an ingredient, a component of an ingredient, or through cross-contamination — it must be declared, regardless of concentration. This makes food allergen management simultaneously simpler (no threshold calculations) and more operationally demanding (even trace presence must be identified and declared).
For haute cuisine R&D teams, the challenge is compounded by menu complexity. A tasting menu may contain 15 courses, each composed of multiple preparations that share kitchen space and equipment. Allergen declarations must cascade from individual ingredients through preparations to finished dishes to the complete menu — and must update immediately when any component changes.
Cross-Industry Challenges
For regulatory affairs professionals and formulators, the cross-industry nature of allergen management creates several persistent challenges:
- Different regulatory vocabularies: Cosmetics uses INCI nomenclature, fragrance uses IFRA ingredient codes and CAS numbers, and food uses common names. The same allergenic substance may appear under different names in different contexts.
- Overlapping but non-identical lists: Some allergens appear in both cosmetic and food regulations (tree nuts, for instance), but the lists are not aligned, and the declaration requirements differ fundamentally.
- Supply chain complexity: Raw materials supplied to cosmetics, fragrance, and food industries often come from overlapping supplier bases. A botanical extract used as a fragrance ingredient and as a food flavouring requires allergen assessment under both regulatory frameworks.
- Reformulation cascades: When a supplier changes the composition of a raw material, the allergen profile of every finished product containing that material must be reassessed — across all industries and product categories simultaneously.
A Unified Platform Approach to Allergen Management
KosmetikOn addresses these cross-industry allergen challenges through a unified platform architecture. Labify® Beauté manages cosmetic allergen declaration under EU Regulation 1223/2009, automatically calculating allergen concentrations from formulation data and flagging when substances cross declaration thresholds. Labify® Nez handles fragrance-specific IFRA compliance, tracking category-specific use limits and labelling requirements across fragrance portfolios. La Dalle manages food allergen declaration under EU FIR, cascading allergen information from ingredients through preparations to finished dishes and menus.
Because all three platforms share the same data architecture and raw material database infrastructure, allergen data is consistent across industries. When a supplier updates the composition of a raw material, the change propagates through every product — cosmetic, fragrance, or culinary — that uses it. This eliminates the data silos that cause cross-industry allergen management to fail in organisations using disconnected tools for each vertical.
AI-Assisted Allergen Identification and Substitution
Beyond compliance tracking, kAI — KosmetikOn's proprietary AI layer — provides allergen identification and substitution support. When a formulator needs to remove a specific allergen from a cosmetic formula, a fragrance accord, or a culinary preparation, kAI can suggest alternative ingredients that provide similar functional or sensory properties without introducing the target allergen. These suggestions draw on structured data from over 100,000 raw material profiles, including cross-reactivity information that helps formulators avoid substituting one allergen for a chemically related one.
Conclusion
Allergen management is a regulatory requirement that cuts across cosmetics, fragrance, and food — three industries that, despite their surface differences, face structurally similar compliance challenges. The regulations differ in their specifics, but the underlying need is identical: track allergenic substances from raw material through formulation to finished product, and declare them accurately under the applicable framework. A platform that understands all three regulatory environments — and maintains a shared, continuously updated ingredient database across them — is the most reliable way to ensure consistent, compliant allergen management at scale.